use estree-walker module

package.json

@@ -59,6 +59,7 @@
   "dependencies": {
     "acorn": "^2.3.0",
     "chalk": "^1.0.0",
+    "estree-walker": "^0.1.3",
     "magic-string": "^0.7.0",
     "minimist": "^1.1.1",
     "sander": "^0.3.3",

src/Module.js

@@ -1,7 +1,7 @@
 import { parse } from 'acorn';
 import MagicString from 'magic-string';
+import { walk } from 'estree-walker';
 import Statement from './Statement';
-import walk from './ast/walk';
 import { blank, keys } from './utils/object';
 import { basename, extname } from './utils/path';
 import getLocation from './utils/getLocation';
@@ -20,8 +20,6 @@ class SyntheticDefaultDeclaration {
 	addReference ( reference ) {
 		reference.declaration = this;
 		this.name = reference.name;
-
-		console.log( 'this.name', this.name )
 	}
 }
 

src/Statement.js

@@ -1,4 +1,4 @@
-import walk from './ast/walk';
+import { walk } from 'estree-walker';
 import Scope from './ast/Scope';
 import attachScopes from './ast/attachScopes';
 

src/ast/attachScopes.js

@@ -1,4 +1,4 @@
-import walk from './walk';
+import { walk } from 'estree-walker';
 import Scope from './Scope';
 
 const blockDeclarations = {

src/ast/walk.js

@@ -1,59 +0,0 @@
-import { blank } from '../utils/object';
-
-let shouldSkip;
-let shouldAbort;
-
-export default function walk ( ast, { enter, leave }) {
-	shouldAbort = false;
-	visit( ast, null, enter, leave );
-}
-
-let context = {
-	skip: () => shouldSkip = true,
-	abort: () => shouldAbort = true
-};
-
-let childKeys = blank();
-
-let toString = Object.prototype.toString;
-
-function isArray ( thing ) {
-	return toString.call( thing ) === '[object Array]';
-}
-
-function visit ( node, parent, enter, leave ) {
-	if ( !node || shouldAbort ) return;
-
-	if ( enter ) {
-		shouldSkip = false;
-		enter.call( context, node, parent );
-		if ( shouldSkip || shouldAbort ) return;
-	}
-
-	let keys = childKeys[ node.type ] || (
-		childKeys[ node.type ] = Object.keys( node ).filter( key => typeof node[ key ] === 'object' )
-	);
-
-	let key, value, i, j;
-
-	i = keys.length;
-	while ( i-- ) {
-		key = keys[i];
-		value = node[ key ];
-
-		if ( isArray( value ) ) {
-			j = value.length;
-			while ( j-- ) {
-				visit( value[j], node, enter, leave );
-			}
-		}
-
-		else if ( value && value.type ) {
-			visit( value, node, enter, leave );
-		}
-	}
-
-	if ( leave && !shouldAbort ) {
-		leave( node, parent );
-	}
-}